Tryng to help a friend. We were out Sat. and right after a hard wot blast.
His car started running like it was on 6 cyl and cut off. When we fire it back up the trans wont move in any gear. We checked all linkage and converter bolts. It acts like the pump is not even moving or the converter is bad. Any idea how to isolate the two issues ?

This is a 70 stang with 460 BB c6 trans with some hard miles on it.

Thanks for any input. This guy always helps me on two man jobs and I have to help him, but don't know crap about a F*rd.

Tryng to help a friend. We were out Sat. and right after a hard wot blast.
His car started running like it was on 6 cyl and cut off. When we fire it back up the trans wont move in any gear. We checked all linkage and converter bolts. It acts like the pump is not even moving or the converter is bad. Any idea how to isolate the two issues ?

This is a 70 stang with 460 BB c6 trans with some hard miles on it.

Thanks for any input. This guy always helps me on two man jobs and I have to help him, but don't know crap about a F*rd.

I would find a Mustang site and post your question there, might get a lot more answers.

www.corral.net

I would find a Mustang site and post your question there, might get a lot more answers.

Got the picture.

You may have more than one issue here. Need to separate the engine and trans issues.

A C6 will not move if it is low on fluid. If the wot trip blew out some fluid it will sit there. Make sure there is vacuum to the modulator. Beyond that, and the band adjustments there is not much external that you can check or fix. Next step is drop the pan and valvebody and air check it.

I also busted the stator support off of one at a boat ramp. It got home, but with no torque multiplication, and filled the trans with metal stuff.

I would say the trans needs to come out and apart.

Corral or Stangnet would be a good place, to go, I might could give you a better answer there without blowing my cover here....

You don't have to go to a Mustang site for help. You did check the fluid level right? 1st you need to determine if the pump is working, there are a few ways to determine this.
Before you start the vehicle after has set for awhile(like overnight) pull the dipstick and note the fluid level(it should show over-full, because the torque convertor will drain some overnight), then start the vehicle, the fluid level should go down, if not then the pump is most likely not pumping, but this could be caused by various other problems. You can also remove one of the cooler lines from the radiator(or external cooler), attach some hoses to the fittings, then start the vehicle and see that it is pumping fluid(about 1-1.5 gal. per minute. Or you could attach a pressue guage to the line pressure fitting on the trans. If you do have pump pressure, then you need to remove the pan and make sure that the linkage is actually moving the manual valve on the valvebody. If not then most likely, the internal linkage nut most likely backed off and the manual valve is stuck in the neutral or park position. If this checks out OK, while the pan is off, make sure that there is no abnormal metal in the pan, if there is, it's time to see a professional. Modulator,vacuum or the band will not keep this transmission from taking gear at all. It's possible(but rare) that he could have snapped the input shaft, or stripped the input splines in the torque convertor. I have seen this happen in monster trucks that were putting out about 1300 HP. I've even seen them snap the mainshaft at the front planetary splines, (with and aluminum planetary).

Thanks Jim,
We checked all the fluids,external linkage,vac line,converter bolts.
I will pull a line and check for pump pressure.I have never dealt with a converter that was bad, so didnt know if it would still turn the pump ?
If you put it in any gear you can push it .
Car is about 400 hp max, with big sticky tires.

You can also try www.460ford.com

Good luck,

Scott

Thanks Jim,
We checked all the fluids,external linkage,vac line,converter bolts.
I will pull a line and check for pump pressure.I have never dealt with a converter that was bad, so didnt know if it would still turn the pump ?
If you put it in any gear you can push it .
Car is about 400 hp max, with big sticky tires.

The pump is actually driven off of the torque convertor hub, It has to flats on it that spline into the center pump gear. The only way that could keep from turning the pump gears is if the hub was broken, which I have never seen on a C6, and if it was broke, you would probably be dumping fluid out of the bellhousing. You could also have a broken center pump gear, but the only way that would happen is if something got into the pump and locked it up, or the convertor came out of the pump, which could only be caused by the bellhousing bolts being backed off, a broken flexplate(flywheel), or too much end-play in the engine, allowing the torque convertor to walk back and forth.The input splines inside of the torque convertor could be stripped, and it would still have line pressure, but wouldn't pull in any range. When you say you can push it in any gear, does that include park? If so, then you most likely have an internal linkage problem that could be repaired without removing the transmission.

Cant be pushed in park. You have given some good info. This car has custom headers and they take about 8hrs to pull so we just wanted to make sure the trans needed to come out or prob just wishing it didnt. I am sure you are aware of what a pain in the butt it can be to have a BB in an early mustang.

Dam, a C-6 is right up there w/ the TH400 and the 727, so if he hurt it he is making some power by me.

pdq67